William keith



, W. KEITH.

Patented Sept. 24, 1895.

Wai 5 TESTING AND FLUSHING DRAIN PIPES, &c.

(No M6661.)

NNDREW EJSWAHAMV PHOTOUTHRWASKINGNN. D C

NITED STATES PATENT TTICE.

WILLIAM KEITH, OF ALLOA, SCOTLAND.

TESTING AND FLUSHING DRAIN-PIPES, 80C.

SPECIFICATION forming part of Letters Patent No. 546,766, dated September 24, 1895.

Application iled October l0, 1894. Serial No.525,458. (No model.) Patented in England November 10, 1893, No. 21,394.

T0 all whom it may concern,.-

Be it known that I, WILLIAM KEITH, a subject of the Queen of Great Britain, and a resident of the town of Alloa, Clackmannanshire, Scotland, have invented certain new and useful Improvements in and Relating to the Testing and Flushing of Drain-Pipes, Soil-Pipes, and Such Like, (for which I have obtained Letters Patent in Great Britain November 10, 1893, No. 21594,) of which the following is a specification.

In the drawings, Figure 1 is a longitudinal section of a drain-trap having a slide-valve iitted therein. Fig. 2 is a part plan of the drain-trap. Fig. Sisa side view, and Fig. 4 a back view, of the valve.

A metal slide-valve b, having a rubber ring b on its face, is fitted in the earthernware drain-trap a. This valve can be worked up and down in the vertical grooves c c made in the sides of the trap, so as to open and close the passage-way e. Secured to the back of the valve by means of a projection g, cast on the valve, and a catch or button h, screwed to the projection, is a wedge-plate c', having avvertical slotj in it. The part of the plate t' may be made thinner and be countersunk at c" in order to save metal and decrease the weight. As will be seen, the handle f is fitted in the socket i2 of the wedge-plate c. The arrangement is such that when it is desired to watertest or tlush the drain the valve-plate b is lowered into the grooves o c of the trap,'so as to seal up or close the passageway e and prevent water passing through it. By pressing down the wedge-plate c' in thegrooves c c the rubber face-ring b is pressed very tightlyy against the face of the passage-way e and a thorough water-tight closure is thus effected. The drain and soil pipes leading to the house can now be filled with water and thoroughly tested. When the testing is finished the valve 'L' may be drawn up out of place and the water allowed to rush down to the sewer and thoroughly flush and scour out the pipes and drain.

The slot j and projection g guide the wedgeplate c' in its up and down movements. The valve l may be kept in the house and only used when desired, or it may be kept in the manhole above the trap.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. A trap having a discharge c and a manhole, a plate-valve, the grooves c, c', arranged to receive the plate valve inserted through the manhole to cover the discharge e and a wedge also adapted to said grooves c, c', and

arranged to be operated through the manhole, substantially as described.

2. In combination, the trap having the opening e and the manhole, the grooves adjacent to the opening, the plate valve arranged in said grooves and having a boss g, and the slotted wedge plate adapted to said grooves and boss, substantially as described.

Signed at Glasgow, Scotland, this 24th day of September, A. D. 1894.

WILLIAM KEITH. Witnesses:

HUGH FITZPATRIOK, WILLIAM FLEMING. 

